Roof from sandwich panels – installation technology

Sandwich panel roofing provides a contemporary and effective option for both residential and commercial structures. These panels offer superior thermal performance and structural integrity because they are made of two layers of metal or another robust material with an insulating core sandwiched in between.

Sandwich panel roof installation entails a number of crucial procedures to guarantee weather resistance and longevity. It is essential to properly prepare the roof’s surface, which includes cleaning and making sure it is structurally sound enough to support the panels.

The panels are meticulously measured and cut to match the roof’s dimensions after the surface has been prepared. This accuracy is necessary to reduce air spaces and guarantee a tight fit, which improves the roof’s insulating properties and general effectiveness.

The panels are cut, then lifted into position and fastened with the proper fasteners. To preserve the structural integrity of the roof and avoid any possible leaks or damage from wind uplift, this step demands close attention to detail.

Lastly, a weather-tight seal can only be achieved by sealing the joints between panels and around any penetrations, like vents or skylights. This guarantees the roof’s long-term functionality and aids in preventing water infiltration.

The slope of the roof

The minimum slope required by SNiP standards for roofing sandwich panels is 5 °, but only if the coating is composed of continuous panels without joints along their length or in roof windows or other structures that compromise the finish layer’s integrity. In all other situations, there should be a minimum slope angle of 7 °.

You should consider the climate characteristics of the construction site when selecting the type of roof structure and the slope angle of the roof. In order to prevent rainwater from lingering at the joints, it is advised to install a roof slope beneath sandwich panels with a minimum 40° slope if precipitation frequently falls out. A roof with a slope of 7 to 25 degrees is the best choice for areas with a dry, hot climate.

It is imperative that you consider right away that a cooler roof requires more roofing material.

A roof with too little slope will retain moisture, which will compromise the panel joints’ ability to remain waterproof. Accumulated water can damage the panel’s outer protective layer and start to erode the metal during thaws and frosts when it turns into ice.

When attaching the sandwich panel roof material to the metal, reinforced concrete, or wood supporting structures, there is no need for extra fasteners due to the minimal slope of the roof. An extra connecting fastener must be installed if the sandwich panels are placed on a structure that is inclined more than 7 degrees.

Instruments and materials for installation

Sandwich panel roof installation involves cutting the material, fastening it, and caulking joints.

Cutting of materials is possible:

  • electric wizards;
  • fine -tooth saw for cold cutting;
  • disk sawing machine.

It is not possible to use hot cutting tools or an abrasive circle grinder exclusively. Heating the cutting area will cause the panel to distort and damage its decorative protective layer, which will ultimately cause the material to corrode.

In order to move sandwich panels around without damaging their surface, it is advised to use a vacuum or mechanical grip.

The protective film on the panel should be removed where the capture is installed.

Long stainless or carbon steel screws with washers and sealing components are used to fasten roofing sandwich panels. To seal the location of fastening, synthetic rubber seals (ethylene-propylene-dive-monomer, or EPDM) are required.

The panel’s thickness and the type of structure it is attached to determine how long the screws should be. Using screwdrivers or an electric drill with revolutions, the screws are tightened.

Avoid overtightening the fasteners as this will shorten their lifespan. A "tattered" self-tapping screw may also harm the panel.

It’s critical to accurately calculate the necessary quantity of fasteners, accounting for:

  • wind load on the object (depending on the height and place of its location);
  • type of object (closed/open);
  • In which area of ​​the roof is the attached panel (the outer panels are most undergoing wind load);
  • the bearing capacity of one fixing element.

In order to perform precise calculations, speaking with an expert is recommended.

The joints that separate the panels must be of excellent, compact quality. It is not acceptable for gaps to appear in the longitudinal compounds.

The simple and effective techniques for installing sandwich panel roofs are examined in the article "Roof from sandwich panels – installation technology." It goes over important procedures like setting up the roof structure, aligning the panels, using fastening methods, and thinking through insulation and weatherproofing. The purpose of this guide is to give builders and homeowners who are interested in learning more about the advantages of using sandwich panels for roofing projects some useful information.


You can learn how to complete tasks correctly by watching the video instructions:

The longitudinal compounds are compacted using silicone sealant or specialized tape, such as the LB ABRISE 10 × 2, regardless of the roof’s angle of inclination. When placing adjacent to vertical structures, a sealing tape is also required.

Features of roofing material

Sandwich panels are a practical material that can be used to arrange a roof. A large variety of plates with varying purposes, sizes, strengths, and fillers are available from manufacturers.

Uses for heat insulators include:

  • polyurethane foam;
  • polystyrene foam;
  • Polyizocyanurate;
  • mineral wool.

The panels serve as insulation and finish coating while also being comparatively light in weight. The best indicators of heat insulation found in sandwich panels made of basalt wool.

To the thin sheet metal that is used to make the panel, a decorative protective polymer coating is applied. This stops the metal from corroding and enables you to paint the panels a variety of colors.

The following guidelines must be followed when installing roofing sandwich panels to prevent harm to the protective layer:

  • do not use hot and abrasive cutting;
  • The protective film from the lower part of the plate should be removed immediately before installing the element, and from the upper – at the end of the installation of the entire coating;
  • Metal chips formed in the process of cutting the material immediately carefully remove and make sure that it does not scratch the polymer layer;
  • In the process of roofing on the roof, walk only in shoes with a soft sole.

When sandwich panels are kept outside, they should be shielded from the elements, including wind, rain, and dirt. To prevent deformation, the material is placed on an even stronger foundation.

Conditions for installation work

Sandwich panels for roofing are installed subject to the following requirements:

  • Wind speed should not exceed 9 m/s., since the panels have a relatively small weight with a significant surface area;
  • work is not carried out during rain, snow or with a thick fog;
  • If artificial lighting is not provided, the installation stops with the onset of twilight;
  • The seal of the longitudinal joints between the sandwich panels is performed at air temperatures above +4 ° C.

Prior to roofing commencing, it is as follows:

  • believe the design, its compliance with the project and the quality of the installation, eliminate the identified differences and shortcomings;
  • Control the correspondence of runs, crossbars and other structural elements to the project;
  • check the ranks on the plane on which the panels will be attached;
  • Prepare tools.

For many building projects, installing a sandwich panel roof is a cost-effective and practical solution. These panels offer superior durability and thermal performance because they are made up of insulated layers sandwiched between two metal sheets.

Maintaining structural integrity and weather resistance during installation requires careful panel alignment and fastening. A long-lasting roof is ensured by paying close attention to detail when sealing joints and edges to help stop possible water leaks.

Furthermore, in order to guard against damage and guarantee worker safety, panels must be handled and lifted safely. To prevent mishaps and preserve the panels’ integrity during the installation process, the right tools and methods should be used.

To sum up, sandwich panel roof installation combines robust performance with efficiency. Building professionals can create a long-lasting, well-insulated roof that satisfies contemporary construction standards by using the right methods and safety precautions.

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Alexandra Fedorova

Journalist, author of articles on construction and repair. I will help you understand the complex issues related to the choice and installation of the roof.

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